CN203707022U - Small-volume thermal protector - Google Patents

Abstract

An embodiment of the utility model discloses a small-volume thermal protector. Production efficiency of the small-volume thermal protector can be increased, production cost is reduced and quality reliability is increased. The protector comprises a shell, a pedestal, a first terminal, a second terminal, a static contact sheet, a temperature-sensitive sheet and a spring sheet, wherein the pedestal, the first terminal, the second terminal, the static contact sheet, the temperature-sensitive sheet and the spring sheet are arranged in a cavity of the shell. The protector is characterized in that one end of an upper portion of the pedestal is provided with at least one rivet which is used to fix the pedestal, the temperature-sensitive sheet and the spring sheet together; a lower end surface of one end of the spring sheet is provided with an embossment portion; the embossment portion is contacted with an upper end surface of the temperature-sensitive sheet when the temperature-sensitive sheet is heated, moves and is overturned.

Description

A kind of small size thermal protector

Technical field

The utility model relates to Protector for electric appliance field, relates in particular to a kind of small size thermal protector.

Background technology

Miniature overheat protector is widely used in the field of the overheated/overcurrent protections such as all kinds of motors, PCB circuit board, electric heating products, battery.

But existing Miniature heat protector manufacturing process is original, its structure is suitable for manual manufacture, and between each parts, the traditional welding manner of normal employing, exists product quality unreliable, the problem that production efficiency is low, production cost is high.

Utility model content

The utility model embodiment discloses a kind of small size thermal protector, can improve the production efficiency of small size thermal protector, reduces its production cost, and improves the reliability of its quality.

A kind of small size thermal protector, comprising:

Base, the first binding post, the second binding post, static contact, thermal sensitive piece and shell fragment in shell and described cavity pocket of outer cover;

One end of described the first binding post, the second binding post and static contact is arranged in described base, and the other end of described the first binding post, the second binding post and static contact extends to the outside of described base;

Described thermal sensitive piece and shell fragment are arranged at the top of described base, and one end of described thermal sensitive piece and shell fragment is fixed on the top of base, and the other end of described shell fragment contacts with the top, one end of described static contact;

One end, top of described base arranges at least one rivet base and described thermal sensitive piece, shell fragment is fixed together;

The lower surface of one end of described shell fragment arranges lug boss, and upper surface when described lug boss is heated action upset with described thermal sensitive piece contacts.

Alternatively,

Described the first binding post and the second binding post adopt the mode of riveted joint to go between.

Alternatively,

Described base, the first binding post, the second binding post and static contact are integral type injection mo(u)lding.

Alternatively,

Described shell fragment and described static contact have conductivity.

Alternatively,

Described shell fragment and described the first binding post electrical connection.

Alternatively,

Described the first binding post and described the second binding post are in same level.

Alternatively,

Described the first binding post and described the second binding post are U-shaped riveting line structure.

Alternatively,

Described static contact and described the second binding post electrical connection.

As can be seen from the above technical solutions, the utility model embodiment has the following advantages:

In the utility model embodiment, a kind of small size thermal protector, comprising: base, the first binding post, the second binding post, static contact, thermal sensitive piece and shell fragment in shell and described cavity pocket of outer cover; One end of described the first binding post, the second binding post and static contact is arranged in described base, and the other end of described the first binding post, the second binding post and static contact extends to the outside of described base; One end of described the first binding post and described the second binding post is arranged at outside described cavity pocket of outer cover; Described thermal sensitive piece and shell fragment are arranged at the top of described base, and one end of described thermal sensitive piece and shell fragment is fixed on the top of base, and the other end of described shell fragment contacts with the top, one end of described static contact; One end, top of described base arranges at least one rivet base and described thermal sensitive piece, shell fragment is fixed together; The lower surface of one end of described shell fragment arranges lug boss, and upper surface when described lug boss is heated action upset with described thermal sensitive piece contacts.In the utility model embodiment; one end, top of base adopts rivet that base and described thermal sensitive piece, shell fragment are fixed together; substitute traditional welding connecting mode; make small size thermal protector be more suitable for industrial production; improve production efficiency; reduce production costs, and the fixed form that the fixed form of rivet is welded is relatively more reliable and more stable, has improved the reliability of quality.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the structural representation of a kind of small size thermal protector in the utility model embodiment;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the cross-sectional view of a kind of small size thermal protector in the utility model embodiment;

Fig. 4 is the structural representation of base 2 in the utility model embodiment;

Fig. 5 is the structural representation of shell fragment 7 in the utility model embodiment;

Fig. 6 is the structural representation of thermal sensitive piece 6 in the utility model embodiment.

Illustrate: shell 1, base 2, the first binding post 3, the second binding post 4, static contact 5, thermal sensitive piece 6, shell fragment 7, rivet 8, lug boss 9.

Embodiment

The utility model embodiment discloses a kind of small size thermal protector, can improve the production efficiency of small size thermal protector, reduces its production cost, and improves the reliability of its quality.

Refer to Fig. 1, in the utility model embodiment, embodiment of a kind of small size thermal protector comprises:

Base 2, the first binding post 3, the second binding post 4, static contact 5, thermal sensitive piece 6 and shell fragment 7 in shell 1 and this shell 1 cavity;

One end of this first binding post 3, the second binding post 4 and static contact 5 is arranged in this base 2, and the other end of this first binding post 3, the second binding post 4 and static contact 5 extends to the outside of this base 2;

This thermal sensitive piece 6 and shell fragment 7 are arranged at the top of this base 2, and one end of this thermal sensitive piece 6 and shell fragment 7 is fixed on the top of base 2, and the other end of this shell fragment 7 contacts with the top, one end of this static contact 5;

One end, top of this base 2 arranges at least one rivet 8 base 2 and this thermal sensitive piece 6, shell fragment 7 is fixed together;

The lower surface of one end of this shell fragment 7 arranges lug boss 9, and upper surface when this lug boss 9 is heated action upset with this thermal sensitive piece 6 contacts.

It should be noted that, this first binding post 3 and the second binding post 4 adopt the mode of riveted joint to go between.This base 2, the first binding post 3, the second binding post 4 and static contact 5 are integral type injection mo(u)lding.This shell fragment 7 and this static contact 5 have conductivity.This shell fragment 7 and this first binding post 3 are electrically connected, and this static contact 5 and this second binding post 4 are electrically connected.This first binding post 3 and this second binding post 4 are in same level; and this first binding post 3 and this second binding post 4 are U-shaped riveting line structure, and the binding post of this U-shaped riveting line structure contributes to the automatic assembling of small size thermal protector in the present embodiment.

The parts such as this shell 1, base 2, the first binding post 3, the second binding post 4, static contact 5, thermal sensitive piece 6 and shell fragment 7 all can adopt material strip mode to carry out automated machine processing, can effectively guarantee the consistent of element size, enhance productivity simultaneously.

This first binding post 3 and the second binding post 4 flush; and strike out the capable binding post of U; and adopt the mode of riveted joint to go between, and can realize two lead-in wires of same time riveted joint, avoid the problem because small size thermal protector volume is little, wiring difficulty appears in two binding post near distances.

It should be noted that, according to the height difference of product temperature section, shell fragment 7 is adding man-hour and can preset as required the height of lug boss 9, realizes the high qualification rate of product; Shell fragment 7 is to be all connected by the mode of riveted joint with the electric terminal of electric terminal, static contact 5 and second binding post 4 of the first binding post 3, and is all in production mould, to complete at punching press shell fragment 7 and base 2 simultaneously.

When the utility model work, in the time that the electric current in the circuit loop forming between the first binding post 3 and the second binding post 4 is excessive, thermal sensitive piece 6 is being experienced after ambient temperature, thermal sensitive piece 6 sudden change upset is out of shape and is promoted lug boss 9, make one end perk contacting with static contact 5 on shell fragment 7, shell fragment 7 separates with static contact 5, thereby cuts off circuit loop.In the time that thermal sensitive piece 6 is experienced ambient temperature reduction, thermal sensitive piece 6 can automatically reset to original-shape, and fall after rise one end of shell fragment 7, and shell fragment 7 contacts with static contact 5 again, thereby connects circuit loop.

Above a kind of small size thermal protector provided by the utility model is described in detail; for one of ordinary skill in the art; according to the thought of the utility model embodiment; all will change in specific embodiments and applications; in sum, this description should not be construed as restriction of the present utility model.

Claims (8)

1. a small size thermal protector, is characterized in that, comprising:

Base, the first binding post, the second binding post, static contact, thermal sensitive piece and shell fragment in shell and described cavity pocket of outer cover;

One end of described the first binding post, the second binding post and static contact is arranged in described base, and the other end of described the first binding post, the second binding post and static contact extends to the outside of described base;

Described thermal sensitive piece and shell fragment are arranged at the top of described base, and one end of described thermal sensitive piece and shell fragment is fixed on the top of base, and the other end of described shell fragment contacts with the top, one end of described static contact;

One end, top of described base arranges at least one rivet base and described thermal sensitive piece, shell fragment is fixed together;

The lower surface of one end of described shell fragment arranges lug boss, and upper surface when described lug boss is heated action upset with described thermal sensitive piece contacts.

2. small size thermal protector according to claim 1, is characterized in that,

Described the first binding post and the second binding post adopt the mode of riveted joint to go between.

3. small size thermal protector according to claim 1, is characterized in that,

Described base, the first binding post, the second binding post and static contact are integral type injection mo(u)lding.

4. small size thermal protector according to claim 1, is characterized in that,

Described shell fragment and described static contact have conductivity.

5. small size thermal protector according to claim 1, is characterized in that,

Described shell fragment and described the first binding post electrical connection.

6. small size thermal protector according to claim 1, is characterized in that,

Described the first binding post and described the second binding post are in same level.

7. small size thermal protector according to claim 1, is characterized in that,

Described the first binding post and described the second binding post are U-shaped riveting line structure.

8. small size thermal protector according to claim 1, is characterized in that,

Described static contact and described the second binding post electrical connection.